Solubility and Reaction Rates of Aluminum Solid Phases Under Hydrothermal Conditions

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Experimental studies involving equilibrium solubility and dissolution/precipitation rates were initiated on boehmite (AIOOH) using a hydrogen-electrode concentration cell (HECC). This cell provides continuous, accurate in situ pH measurements of solid/solution mixtures to 295 C with provision for either removing solution samples for analysis of the metal content, or adding either of two titrants. This cell has been recently used to measure the solubility of minerals such as brucite; boehmite, zincite, arid magnetite. The ability to perturb pH, isothermally by addition of acidic or basic titrant opens the door for studies of the kinetics of dissolution/precipitation, even for relatively fast reactions. ... continued below

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Benezeth, P.; Palmer, D.A. & Wesolowski, D. November 14, 1999.

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Experimental studies involving equilibrium solubility and dissolution/precipitation rates were initiated on boehmite (AIOOH) using a hydrogen-electrode concentration cell (HECC). This cell provides continuous, accurate in situ pH measurements of solid/solution mixtures to 295 C with provision for either removing solution samples for analysis of the metal content, or adding either of two titrants. This cell has been recently used to measure the solubility of minerals such as brucite; boehmite, zincite, arid magnetite. The ability to perturb pH, isothermally by addition of acidic or basic titrant opens the door for studies of the kinetics of dissolution/precipitation, even for relatively fast reactions. By monitoring the change in pH, with time, detailed kinetic information can be obtained without the need for sampling.

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OSTI as DE00014625

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  • Report No.: ORNL/CP-103300
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 14625
  • Archival Resource Key: ark:/67531/metadc626374

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  • November 14, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Jan. 21, 2016, 12:23 p.m.

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Benezeth, P.; Palmer, D.A. & Wesolowski, D. Solubility and Reaction Rates of Aluminum Solid Phases Under Hydrothermal Conditions, article, November 14, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc626374/: accessed June 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.